[BUG] dart generator creates invalid code

[just-doit]

Description

The attached example demonstrates the problem.

It contains two classes (Obj1 and Obj2).
Both have the same mode property.

In the class Obj1 this results in the property

Set<Obj1ModeEnum> mode;

while in the class Obj2 the property looks like this:

Set<ModeEnum> mode;

Here I would expect Set<Obj2ModeEnum> mode;.

In the file obj1.dart the associated type is

class Obj2ModeEnum {
  /// Instantiate a new enum with the provided [value].
  const Obj2ModeEnum._(this.value);
  ...

Here I would expect Obj1ModeEnum.

In the file obj2.dart the corresponding type is correct (but duplicate, since it's in obj1.dart already):

class Obj2ModeEnum {
  /// Instantiate a new enum with the provided [value].
  const Obj2ModeEnum._(this.value);
  ...

openapi-generator version

openapi-generator-cli 7.6.0
  commit : ab7d0cb
  built  : -999999999-01-01T00:00:00+18:00
  source : https://github.com/openapitools/openapi-generator
  docs   : https://openapi-generator.tech/

OpenAPI declaration file content or url

{
  "openapi": "3.0.1",
  "info": {
    "title": "api_test",
    "version": "1.0.0"
  },
  "paths": {},
  "components": {
    "schemas": {
      "Obj1": {
        "type": "object",
        "properties": {
          "mode": {
            "uniqueItems": true,
            "type": "array",
            "items": {
              "type": "string",
              "enum": [
                "mode1",
                "mode2",
                "mode3"
              ]
            }
          }
        }
      },
      "Obj2": {
        "type": "object",
        "properties": {
          "mode": {
            "uniqueItems": true,
            "type": "array",
            "items": {
              "type": "string",
              "enum": [
                "mode1",
                "mode2",
                "mode3"
              ]
            }
          }
        }
      }
    }
  }
}

Generation Details

I'm using the following command:

openapi-generator generate -g dart -i spapi.json -o "$(pwd)/spapi" --additional-properties=pubName=spapi

Steps to reproduce

Use provided sample json and command.